My pet Mayan Cichlid spends a lot of her time picking up gravel and blowing it out at the front glass of the tank. She has now totally wrecked the tank, all the plants have gone and the rocks are sitting on the bottom glass. Is there a purpose to this behaviour or is she just amusing herself.Should I rebuild the tank so that she can continue amusing herself or leave it alone?She has the 200 litre tank to herself apart from 6 sardinas (characins).

No Matt, she keeps at it now and again.When it is quiet and I am working on my computer I hear the chink, chink as the gravel hits the glass.I sometimes think she is trying to get my attention and wants food.